However, there are a variety of irregular nouns whose spelling changes when making the singular form plural
The word “this” refers to one person or thing, so the third-person singular “includes” is used
noun
(in later… 1 a : financial burden or outlay : cost built the monument at their own expense b : an item of business outlay chargeable against revenue for a specific period c : something expended
2
[ countable] a cause or occasion of spending: A car is a necessary
However, in more specific
the use of money, time, or effort: 2
Often specifically an act of disbursing or spending funds while expenses is plural of lang=en
It is correct to say “revenues” when referring to types of revenue such as “sales revenues
In more general, commonly used, contexts, the plural form will also be regulation
; Please keep track of these expenses
; In most cases (there are some exceptions—but not when it comes to this word), if it doesn’t have an s
But these are relatively difficult "irregularities" within the language
charges or costs met with in running a business, doing one's work, maintaining property, etc
a car can be a considerable expense
Plural expenses (countable) An expense is something for which you spend money
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Often specifically an act of disbursing or spending funds while expenses is plural of lang=en
expense: 1 n a detriment or sacrifice “at the expense of” Type of: detriment , hurt a damage or loss n money spent to perform work and usually reimbursed by an employer “he kept a careful record of his expenses at the meeting” Types: incidental , incidental expense , minor expense (frequently plural) an expense not budgeted or not specified 1
You always add the “-‘s” at the end when using the possessive form
One of my friends is / are a writer
Spendings, plural, with an "s" is horrible, it may exist but should be avoided
Forming plural nouns can be difficult
In more general, commonly used, contexts, the plural form will also be expenditure
money that you spend when you are doing your job, that your employer will pay back to you: 2…
The fact that the book gives the unnatural examples in OP doesn't change that
Please keep track of this expense